Long-stroke amplifying device



Jan. 19,1926. 1,570,385

, B. M., M FARLAND ET AL LONG STROKE AMPLIFYING DEVICE Filed June 13,1925 2 Sheets-Sheet 1 Jan. 19 ,1926; 1,570,385

B. M. M FARLAND ET AL LONG STROKE AMPLIFYING DEVICE BY Marga. D/wgi/z/rA TTORNE Y 15 part of this application.

Patented Jan. 19, 1926.

UNITED STATES ram-mm 1E. Hermann AND a. DIMMICK, or ELIDORADO,

nonesrnoxn AMrL-xrvme nnvrcn.

a ucs uon mam, 18,1925. Serial No. eases; I

To all whom it may concern: 1

Be it known that we, BENJAMiN M. Mo- FARLAND and Max A. DIMMICK,citizens of the United States, residing at Eldorado, in the county ofButler and State, of Kansas, have invented certain new and usefullImprovements in Long-Stroke Amplifying Devices; and we do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the figures of reference marked thereon, which form a Thisinvention relates ratus for wells and particularly to a long strokepumping mechanism especially designed for pumping oil wells, and theprimar object of the invention is to provide mec anism adapted to beassociated with the walking beam of an oil well rig to increase the'strokefof the pump rods beyond what would be their normal amplitude ofmovement' with the conventional pumping ele-- ments ordinarilyconsisting. of the walking beam, the power driven band wheel and thepitman 7 walking beam and the band wheel shaft.

The advantages of a long stroke pumping outfit for oil wells are nowgenerally recog- 'nized so we will confine ourselves to a dearrangementof parts scription of the, novel and combination of parts, all of whichwill be specifically descrlbed hereinafter,:reference bein' had to theaccompanying drawi s,inwich- 1g.- 1 is a perspective view of the lowerpart of an oil well rig to which our invention is a plied.

. Fig. 2 is; an e arged, fragmentary, side elevational view of the frontendof a walking beam showing the stroke amplifying lever and certain ofits connections.

Fig. 3 is a cross sectional view on the line 3-30f Fig. 2.

Fig. 4 is a cross sectional view on the line 44 of Fig. 2.

5 is an end-view of the walking beam- F g. and mule-head.

Fig. 6 is a cross sectional view through the main sill showin the clevisanchor for the:1 operating rods 0 the multiplying lever, an

to pumping appa-.

and 'crank connections between the Fig. 7 is across sectional view onthe line 71- 01E 5. Referring now to-the drawings t e merals ofreference 1 designates derrick floor, 2 the main sill, 3 oneof the jackposts, (of which there-are two, one on each'side of the band wheel) 4the band wheel, 5 the by Y nuband wheel shaft, 6 the crank, 7 the itmanand 8-the walkingfbeam on the amson post 9. All ofthe construction thusfar described is standard rig and ordinarily the pump rod 10 isconnected direct to the front end of the walking beamY8,-sometimes overa mule-head. When the pump rods were connected direct .to ,the front endof thewalking. beam the pump stroke, obviously,-"

could not exceed the up and down motion" of the front end of the walkinbeam, but with our inventionthe use oft e amplifying lever imparts areciprocatory motion to the pump rod equal to the amplitu'deof motion ofthe front .end of the walking'beam plus the motion of the front end ofthe amplifying lever so that more i fluid may be raised or each upstrokeof the working barrel of the pum than will. beossible .whenthe pump r0 sare connected irect to the walkin beam.

The stro e amplifying lever is illustrated as comprising two bars 11 and12 which,lfor the sake of strength, may consist of channels. These arehung in U-sha edslings13 and 14 comprising straps whic hangfrom-f afulcrum shaft 15 mountedin a bearing 16 bolted, orotherwise secured, tothe walln'ng beam 8 in rear of the toe orflfrontend por-' tion thereof.The ends offtheslings are. spaced apart by spacers 17 and 18 sleiived'yto i'g.

,of the upon the shaft 15 and by referrin 4 it will be seen that either,orbot slings ma be removed from the shaft taking 0 h channels 11 and 12are mounted in the shngs the nuts '19 and 20. :The' bars or,

intermediate'their ends and they are located on the respective sides of,the walking beam so that the lever may straddle the walking beam. At theforward ends of thebars or channels 11 and 12 are two segmental-plates21 and 22 connected at their up er ends by a yoke-bar 23, and pivoted tot e plates 21 and 22 are segmental bars24 and 25 curved on the panelarcs as the plates 21 and 22. The plates and the-bars 24 and 25constitute a mule-head with grooves 26 and 27 in the g front edges ofthe .plates 21 and 22 and the plates in any appropriate manner,-but invig. 2 we have shown a simple form of pivot consisting of a bolt 33 forconnecting the bar 24 to the plate 21. Obviously,-the bar 25 may beconnected to the plate 22 in a like manner. Each bar 24 and 25 is heldin extended position, or. full line position illustrated in Fig. 2, bybraces. One brace is illustrated in Fig. 2 as comprising a bar 34pivoted to a bracket 35' on'the channel 11 and having a pivot connection36 with a link 37 in turn pivoted at 38 to the bar 24.

Men the parts are in the position shown in Fig. 2 the line ofcompression against the bar 24 will be through the bolt 38, the bolt 36and the pivot 39 on bracket so the brace will hold the bar 24 inextended positiom This will be the position occupied during the pumpingoperation. When, however, it is desired to pull the rods for inspectionor repairs the lower part of the mule-head, consisting of the bars 24and which hang links 44 and straddlin 25, should be swung inwardly outof the way then it is only necessary to break the joint at 36 so thatthe parts can be caused to assume the dotted line-position shown in,

Fig. 2.

We have only described the connections between the bar 24 and thebracket 35 on channel 11, but attention is called to the fact that thebar 25 is connected to its chan- 'nel 12 in substantially the same waythat the bar 24 is connected to the channel 11. The rear ends of the twobars 11 and 12 of the amplifying lever carry bearings 40 and 41 in whichare shafts 42 and 43' from channel 11, and links 46 and 47 strad lingthe channel 12.- The links 44 and 45 carry at their lower ends a pin 48with a spacer 49 thereon extending through the eye 50 of a pull rod, oroperating rod 51 while a similar rod 52 is connected to the links 46 and47 in the same manner as the rod 51. The rods 51 and 52 have at theirlower ends separate parts 53 and 54 connected lay-turnbuckles 55 and 56.The eyes 57 an 58, at the lower ends of the rods 51 and 52, areconnected to a clevis, consisting of the side bars 59 and 60 andthe'bottom plate 61, by a bolt 62 which asses through the side bars 59and 60 and t rough the eyes 57 and 58. The side bars 59 and 60 arebolted to the sides of the main sill 2 b a bolt 63 and at the lower.ends of the Si e bars 59 and the- 60 are openings through which thetongues 64 and 65 of the bottom plate 61 project so" that the clevis,formed by the side bars 59- and 60 and the plate 61, is fastened to themain sill.

When the walking beam is rocked on the Samson post 9, receiving itsmotion from the band wheel 4 and its connections, the amphfying leverwill be swung in a vertical are but as the fulcrum 15 is moved upwardlythe pull of the rods 51 and'52- will impart a swinging movement to theamplifying lever so that it will havea movement independent of themovement of the walking beam, therefore the lift on the pump rod 10 willexceed that which would be imparted to the pump rod if it was connectedto the end of the walking beam and inversely when the front end of thewalk ing beam is swung downwardly the rods 51 and 52 will impart acorrespondingreverse movement to the stroke amplifying lever so that thestroke of the pump rod will be increased above normal and thereby pump agreater amount of fluid from, the well at each stroke than can be pumpedwith the same working barrel'under normal conditions. By the pump rod,of course, we mean the entire string of pump rod members normally usedin a well.

7 One of the advantages of our invention is that it can be installedonan ordinary walking beam and that one end of vthe amplifying lever canbe fastened, or anchored,

lever pivoted intermediate its ends to the walking beam, a mule-head onone end of the lever, means associated with the mule-head for connectionwith the polish rod clamp of an oil well pum and means for anchoring therear end of the lever in fixed relation with respect to the floor of therig.

2. In. combination with the walkin of an oil well rig, of a stroke ampifying lever pivoted intermediate its ends to the walking beam, rigidrods pivotally connecting the rear end of the stroke amplifying lever toa rigid part of the rig, and means on the front end of the lever forconnection to the polish rod of an oil well 3. A pumping apparatuscomprlslng a walking beam, an amplifyin lever, comprising two spacedbars stradd ing the walking beam, having a common fulcrum, intermediatetheir ends mounted upon the beam.

walkin beam, rods connecting the rear ends of the gals to a rigidsupport, and a mulehead connecting the forward ends of the bars.

4;. A pumping apparatus comprising a walking beam, an amplifying leverstraddling the beam and pivoted thereto intermediate its ends, means,for holding the rear end of the lever in relatively fixed position, and.a mule-head on the other end of the lever.

5. A'pumping apparatus comprising a walking beam, an amplifying leverstraddling the beam and pivoted thereto inter Lmediate its ends, meansfor holding the rear end of the lever in relativelyfixed position, and amule-head on the other end of the lever, the mule-head having a flexibleloop receiving portion- 6. A pumping apparatus comprising a walkingbeam, an amplifying lever straddling the beam and pivoted theretointermediate its ends, means for holding the rear end of the lever inrelatively fixed position, a mule-head on the other end of the lever,the mule-head having a flex ible loop receiving portion, and arcuateguiding grooves for a flexible connecting member.

7. A pumping apparatus comprising a fulcrum having means for attachmentto a walkin beam, a pair of slings hung on the ends of the fulcrum,spaced parallel bars hung in the slings, a mule-head connecting theforward ends of said bars, rods loosely connected to the rear ends ofsaid bars, and means on the rods for connecting them to a support.

8. A stroke am lifying apparatus comprising a fulcrum aving means forattach ment to a walking beam, spaced bars pivotally hung from the endsof the fulcrum, arcuate plates secured to the forward ends of said bars,means connecting the upper ends ofsaid plates, the edges of the platesand the edge of the connecting means having guide grooves, and anchoringmeans on the rear ends of the bars.

9. A stroke amplifying apparatus comprising a fulcrum having means forattachment to a walking beam, spaced bars pivotally hung from the endsof the fulcrum, arcuate plates secured to the forward-ends of said bars,means connecting the upper ends of said plates, the edges of the platesand the edge of the connecting means having guide-grooves, and anchoringmeans on the rear ends of the bars, said means comprising pairs of linksconnected to said bars and rods connected to the links. I

10. A stroke amplifying apparatus comprising a fulcrum having means forattachment to a walking beam, spaced bars pivotally hung from the endsof the fulcrum, arcuate plates secured to the forward ends of said bars,means connecting the upper ends of said plates, the edges of the platesand the edge of the connecting means having guide grooves, anchoringmeans on the rear ends of the bars, said means comprising pairs of linksconnected to said bars and rods connected to the links, and anchorsengaging the lower ends of the rods.

11. A stroke am lifying apparatus comprising a fulcrum, aving means forattachment to a walking beam, spaced bars pivotally hung from thefulcrum, segmental plates vertically supported by the bars, arcuate barspivotally' supported by the plates, collapsible braces between thearcuate bars and the first named bars, and anchoring means on the rearends of the first named bars.

In testimony whereof we aflix our signatures.

BENJAMIN M. MCFARLAND. MAX A. DIMMIGK.

